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Re: [Qemu-devel] [Qemu-stable] Broken live Migration in Qemu 2.5.1.1?
From: |
Stefan Priebe - Profihost AG |
Subject: |
Re: [Qemu-devel] [Qemu-stable] Broken live Migration in Qemu 2.5.1.1? |
Date: |
Mon, 6 Jun 2016 18:13:48 +0200 |
We're most probably seeing the same while migrating a machine running balanceng
but haven't thought this might be a qemu bug. Instead we're investigating with
balanceng people.
Waiting for your further results.
Greets,
Stefan
Excuse my typo sent from my mobile phone.
> Am 06.06.2016 um 17:51 schrieb Peter Lieven <address@hidden>:
>
>> Am 06.06.2016 um 15:32 schrieb Peter Lieven:
>> Hi,
>>
>> during internal testing of Qemu 2.5.1.1 I found a vServer running Ubuntu
>> 12.04 (kernel 3.13) and a slave SQL server to
>> stop replicating from the master. This seems to be reproducible. It is
>> possible to continue replication when issuing a slave stop / slave start.
>> There is no error visible on the vServer.
>>
>> Has anyone a fix in mind that could be related to such an issue?
>>
>> Host kernel in Linux 4.4, Guest kernel 3.13. Guest driver is virtio-blk via
>> iSCSI. Emulated vCPU is Westmere.
>
> After a lot of testing I found out that obviously thats no block driver
> problem, but a regression in the virtio-net or the network stack.
>
> qemu_announce_self() is generating packets for all NICs, but it seems they
> are no longer emitted. This worked at least in qemu-2.2.0 with
> the same guest kernel and host kernel.
>
> I will continue debugging tomorrow why this happens.
>
> Peter
>